Table crumber



Dec. 28 ,1926. l1,612,529

F. w. NURENBERG TABLE CRUMBER Filed June 1b. 1925 ATTORNEY Patented Bec.28, 192?.

Unire stares FRED W. NURENBEBG, OF BRGOKLYN, NEVI YORK.

TABLE CRUMEER.

Application filed June 1G, 1925. Serial No. 36,073.

Among the principal objects which the present invention has in view are:To provide a crumb collecting device operable by the, and as a result ofthe, movement of thel crumber across the table; to insure the rotationot the collecting brush with which the crumber is provided; and tosimplify and cheapen the construction.

Drawings:

Figure 1 is a front view ot the crumber constructed and arranged inaccordance with the present. invention, a portion ot the crumbcollecting brush being cut away to show the construction therebehind,the broken lines in said figure being used for .showing the dumpingposition of the crumb tray;

Figure 2 is a. top plan view ot the same on enlarged scale7 showing thedriving mechanism for the brush partly in section, and a portion of theoverhang ot the crumb tray cut away;

Figure 3 is a sectional view, the section being taken on the line 3 3 inFigure 1, the broken lines in said figure being so disposed to indicatethe inactive position ot the driving` wheel of the driving gear;

Figure 4 is a similar view showing the driving wheel in active position;

Figure 5 is a cross section, the sect-ion being taken as on the line 5-5in Figure 2.

As seen in the drawings the crumb tray has a partly cylindrical body 10,provided with a swinging iat bottom plate 11. The bottom plate 11 isheld in operative relation to the body 10 and the brush 12 by a. spring13. The bottom plate 11 swings on the pivot pin 14 from the closedposition -shown in full lines in Figure 1 to the open position shown bydotted lines in said figure. when the handle 15 is pressed upward. Theends of the body 10 are closed by end plates 10 extending laterally ofthe body in parallel relation to form a bearing tor the twisted wireshaft 16 ot' the brush 12, and a guide for the loop 17 formed on thebearing plate 18 which supports the boss 19 in which the short studshaft 2O is set. The shat't 20 supports the driving wheel 21.

As seen in Figure 2 ot the drawings the driving gearing for the brush 12employs a gear pinion 22, which is mounted rigidly on the shaft 16. Theshaft 16 is journaled in the journal box 23 which slides in a recess 24in the forward edge of the outer .end plate 10. The teeth of the pinion22 mesh with the teeth of the internal gear 25 with which the drivingwheel 21 is provided. The difference in the diameters of the pinion 22and the driving wheel 21 gives the ratio ot the speed to the two wheels.

The bearing plate 18 swings on a pivot 26. The bearing plate 18 is heldin its lower position by a spring` bar 27, the free end of which restsupon the boss 19, as shown best in Figure 3 of the drawings.

The result ot the above described construction is that whenever theoperator using the handle 28 presses the apparatus upon the table clothfor collecting crumbs thereon7 he forces the wheel 21 into friotionalcontact therewith, the wheel 21 and the plate 18 on which it is mountedyielding upwardly, the spring 27 being flexed to permit the action.Thereafter, however, the spring 27 operates to exert a pressure upon theplate 18 and the wheel 21, which maintains the frictional engagement ofthe said wheel with the table covering. As and when the wheel 21 isrotated, the pinion 22 and the brush 12 operatively connected therewithare rotated proportionately tast, and, by reason of the location of thesaid pinion the direction of rotation of brush is the same as the wheel21. The brush sweeps the table covering directly in front of the frontedge ot the tray bottom 11, and any crumbs in the path of the tray areswept rapidly by the brush upon the said bottomv and into the body 10.

Whenever the tray is suticiently loaded and it is desired to get rid ofthe contents the handle 15 is pressed upward to drop the bottom 11 tothe position shown by the broken lines in Figure 1. 1n this position otthe bottom the contents ot the tray are readily disposed of.

Claims:

1. A table crumber comprising a tray formed with a partly cylindricalbody having closed ends comprised ot plates extending laterally of thebody, a flat bottoni plate hingedly connected to one of said end platesand extending beneath said body and beneath and between said end platesin advance of said body` a rotary brush journalled between the ends otsaid end plates in advance ot said bottom plate, a` traction wheeloperatively connected with said brush for rotating said brush uponmovement ot said traction wheel over a table cloth, a plate pivot-allymounted on one ot said end plates. a bearing tor said traction wheelformed on said pivotally mounted plate whereby relative movement betweensaid brush and traction Wheel is permitted, and orumber carried meansfor pressing said traction Wheel down upon a table cloth.

2. A table erumber comprising a tray formed with a partly cylindricalbody liaving closed end plates extending in parallel relation laterallyof the body, a at bottom plate hingedly connected to one of said endplates and extending beneath and between said end plates under and inadvanee of .said body, a rotary brush journalled between the ends ofsaid end plates in advance of said liinged bottom plate, a movable platepivotally mounted on one of said end plates, a traction Wheel Carried bysaid movable plate, operative connection between said traction Wheel androtary brush, and a spring bar connected at one of its ends to the endplate carrying said movable plate, said spring bar bearing at itsopposite end against said movable plate for retaining said tractionWheel in engagementwith a surface over which the erumber is moved.

FRED W. NURENBERG.

